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HelicopterCentury Radikal G20-30 N640 Hawk Predator › Hawk 50 Pro here in the morning
07-11-2008 11:25 PM  9 years agoPost 21
Blade_Master1

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Canada

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overall they are good machines, they are durable provided they are built right, The maintenance is low and easy.
they have a few build issues but those have been posted so if you did read first you will love your Hawk

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07-13-2008 12:05 AM  9 years agoPost 22
Rbush

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I've put 1/2 a gallon of fuel through my Hawk 50 Pro today, while running it in. I've noticed a few things. The heli pitches up all the time in fast forward flight on the kit 600mm wooden blades. and the gearing is 9.75:1, 30 gearing !!

50 gearing would be around 8.5 - 8.7:1, why is the Hawk 50 Pro on 9.75:1 ?? Can you buy 50 gears? and what gearing is in the Raven 50?

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07-13-2008 01:11 AM  9 years agoPost 23
Blade_Master1

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The Raven has a 14t pinion and a 53t pinion on the intermediate shaft.

You can try changing the metal pinion on the intermediate to a 14t
if it isn't already

Kind of weird they would have the wrong gears

As for the pitching up is the C.G correct ?

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07-13-2008 02:19 AM  9 years agoPost 24
MAXHSHV

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,mn usa

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9.75 /1 gearing sounds like 37 hawk pro gearing for sure witch means you have a 13 pinion and a 55 counter gear. the 14 pinion off the raven or the kinetic 50 is a direct swap witch will give you 9/1 gearing but the 53 tooth counter gear requires a constant driven tail to install, as it is a speed up gear for the raven, available through heliworld and that will give you roughly 8.7 /1 gearing.however i've found the speed up gear doesn't make much difference and it's really easy to bog the head with it in.plus it requires a lot of disassembly to install the constant drive and the speedup gear.however the constant drive is worth it's weight in gold for doing auto's.or in the event of a flameout.as for the pitchyness in fast forward, the rotor tech 610's will take care of that. they are the best blades for fff that i've flown and i've flown most blades.they really smooth out the earobatics aswell, they make a guy look a better pilot then he is.

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07-13-2008 11:47 AM  9 years agoPost 25
Rbush

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The C of G is spot on.

I'm not ging to buy the new gears as this would make the model cost as much as anything else 50 size in the UK to buy. This heli is cheapish in the UK but if you have to buy extras just to bring it up to standard, it becomes expensive. I don't mind having an out dated model if its cheap, but this would no longer be cheap with the extra bits on it.

So I'll have to fly 1750 on the head max (that's pretty bad for a 50 kit)

But on the good side, it means I have PLENTY of power to run 620mm blades , if they fit, do they ?

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07-13-2008 12:45 PM  9 years agoPost 26
Dilbeck

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Springdale Arkansas

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The largest blades I know of that will fit are the 615mm FAI Blades.

Clint

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07-13-2008 01:18 PM  9 years agoPost 27
Rbush

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I have pulled the main blade down and aligned the tail blade and there is about 30mm clearance. I assume a 620mm would fit with a 10mm clearance??

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07-13-2008 01:22 PM  9 years agoPost 28
Dilbeck

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Springdale Arkansas

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I think the root size on the 720mm blades are to large to fit in the head.

Clint

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07-13-2008 01:32 PM  9 years agoPost 29
Rbush

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I'm not talking about a 720mm blade. 720mm would be way to long. The root on a SAB 620mm is the same as the root on the kit woody. My mate left a set here and I've just measured them. I'll take them to the field latter on and see how she goes.

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07-13-2008 02:03 PM  9 years agoPost 30
Dilbeck

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Springdale Arkansas

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Sorry I mistyped 720 for 620.

Clint

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07-13-2008 02:11 PM  9 years agoPost 31
Rbush

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I thought it sounded a bit optimistic to fit 720's on a 50 machine

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07-13-2008 11:11 PM  9 years agoPost 32
MAXHSHV

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yes the 620's fit great.the pinion gear is only $4.99 us dollorsand it takes it from 9.75 to 9.0/1 the same as a stk raven.

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07-14-2008 12:58 AM  9 years agoPost 33
Rbush

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I've now flown her on SAB 620's. She flies well with lots of lift. But I've had a change of plan and will be selling the Hawk tomorrow.

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07-14-2008 02:13 AM  9 years agoPost 34
MAXHSHV

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what will you be replaceing her with?

I could offer a few good suggeastions.

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07-14-2008 10:33 AM  9 years agoPost 35
Rbush

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Raptor Titan.

Having now flown it for a gallon, I'm not totally happy to hang a £300 scale body from it, and I'm not totally happy with the quality I must say.

I've set-up hundreds of helis, and this one does not seem as happy as anything else I've had. Hovering on the spot is a challenge, and it was not even windy. Pirouetting on the spot is VERY hard. Raptors are a good solid flying machine with little or no reliability worries. I know the tail is a problem with Raptors, but I have this nice Century alloy one to fit.

This is NOT a Raptor V Hawk situation, I've just decided to go another way. You get what you pay for with the Hawk. It's a good little flyer if that's all you want from it. I however want a solid in the hover mechanics that can handle slow flying in windy weather. I know the Hawk will do it, but I think the Raptor does it better?

Just my opinion,

I've closed this thread just to make sure it does not end up a Hawk Raptor war.

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HelicopterCentury Radikal G20-30 N640 Hawk Predator › Hawk 50 Pro here in the morning
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